Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: qual é a data em que o número da gravata é 9?
 ###Tabelas: CREATE TABLE kawerau_district (kawerau_district_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Years VARCHAR, Gender VARCHAR, Area VARCHAR, Authority VARCHAR, Decile INT) CREATE TABLE fourth_round_proper (fourth_round_proper_id AUTO_INCREMENT PRIMARY KEY, Tie no VARCHAR, Home team VARCHAR, Score VARCHAR, Away team VARCHAR, Date VARCHAR) CREATE TABLE ladder_breakdown_by_opposition (ladder_breakdown_by_opposition_id AUTO_INCREMENT PRIMARY KEY, Opponent VARCHAR, Played INT, Won INT, Lost INT, Drew INT, Premiership points INT, Points for INT, Points against INT, Percentage (%) VARCHAR) CREATE TABLE administered_by_the_national_government:_tuition-fee_free_salary_paid (administered_by_the_national_government:_tuition-fee_free_salary_paid_id AUTO_INCREMENT PRIMARY KEY, English Name VARCHAR, Japanese orthography VARCHAR, Pronouciation VARCHAR, abbreviation VARCHAR, Provider(national government) VARCHAR, Foundation INT) CREATE TABLE rank_by_time_in_office (rank_by_time_in_office_id AUTO_INCREMENT PRIMARY KEY, Rank: INT, Premier: VARCHAR, Party: VARCHAR, Assumed Office: VARCHAR, Left Office: VARCHAR, TOTAL Time in Office: VARCHAR)  
SELECT Date FROM fourth_round_proper WHERE Tie no = 9